Air lift-pump.



F. G. KIMBALL.

AIR LIFT PUMP.

APPLICATION FILED MAR. 10, 1908.

939,270. Patented Nov; 9, 1909.

w I n akto'nnugs Q/vi hi use:

YUNITED TA ream: GEORGE KIMBALL, or wmrrmn, oanrroiaum.

AIR LIFT-PUMP.

To all whom it may concern: Be it known that I, FRANK Gnonon KIM- BALL, a citizen of the United States, residing at Whittier, in the'county of Los Angeles and State of California, have invented a new and useful Air Lift-Pump, of which the following is a specification.

This invention relates to that class of mechanism known as air lift pumps, and. has for its object to provide an improved air lift pump by means of which the air injected into the pump Will be thoroughly mixed with the volume of liquid, and by mehns oi which the lifting of the liquid v0lume.will be made very elfective.

The invention consists of an air lift 'pump constructed and arranged as hereinafter set forth and claimed. I Referring to the accompanying drawings Figure 1 is a view in elevation and vertical section of an air lift pump constructed in accordance with this invention. Fig.2 isa plan view, partly in section, of the lower portion of the pump detached from the upper portion. l ig. 3 is a detail view of the lower jet nozzle.

The. air lift pump, which may he made of brass, or other suitable metal, is constructed with the main frusto-conical section 1, the upper frusto-eonical section 2, the discharge cylindrical portion 3, (only its lower end being shown and broken away), and the suction pipe 4, (only its upper end being shown), the several parts having their ad'- joining ends detachably connected by screw threads as shown. I

. Located in the .lower end of the portion 1, and mounted outhe inner wall thereof and projecting laterally therefrom, is an air jet,

bent to project upwardly, and provided with a detachable nipple. (3, screw-threaded thereon, the parts forming an injector nozzle. An air inlet pipe '8 is connected to the inlet passage way 8 communicating with the jet .5. As clearly shown in the drawings, the-- injector consists of .a pipevvhich enters the pipe 1 and extends therein in a transverse has a fiat term in ipross section from its point of entrance to and including the bend in it, the longer dimension ofsuch flattened storm being parallel axisof the discharge pipe, by reason o iwhich Specification of Letters Patent. Patented NOVA), 1999. Application filed MarchlO, 1908. Serial N 0. 220,225.

ance is offered to the flowfoi. the'liquid through the pipe 1. I

pipe 7, and issues through the jet nozzle 3, thus tending to carry up a volume of liquid through the pipe 1, and this stream of liquid issues from the contracted mouth of "said pipe, and passes into the larger end of the upper pipe 2. J I "a lhe upper end oi the p pe 1 s provided. with a circumferential acket or casing;- 9

Air under pressure is forced throughthe inclosing an annular chamber 10 through whichleads an inlet port 11, the latter being in communication with an inlet pipe l9. through which fluid under pressure is forced into the passage 10. This fluid escapes through a series of portsl which are ar-' ranged in a circular series, andpresehted in a direction to discharge tangentially to the circle thus described, and also tilted to discharge obliquely with respect to the axis of the pipe, by reason or which the fluid issuing from said ports given a helical motion when it strikes the inner surface ofthe pipe. The jets oat-fluid issue from the ports 13 at the point where the stream of liquid issues frointh'epipe'l, and pass into the wider end of the pipe 2, so thatat the point ,where the jets strike thefouter, surface of the stream ofl'iquid, there is a free space which will permit the jets to issue freely from the ports. The helical ets strike againstthe liquid,andtherfiuid will tend to follow the wall of thepipe 2, thus formin liquid, and at the same time will act't carry.np or accelerate the movement-ofthe stream ilOWlllCll ann'utlal impulse has heen impartedhy the zle6.

The jets of itluitl follow generally the 'in terior wall of the pipe 2, and are notdireeted'across the' path oi-"the' liquidfin. 2a manner;asto interfere with, and" jet issuing from the nozabove its inlet-j-etports arran v I .series, and-presented in a motion,

charge-tan entially to), the circle th' 'de' scribed, an the axis of the pi e. r

, luau airlitt pump s;

conical pipes disposed -1 "'11 ct extent with;

each othefithesimiller end pfthe-lower pipe '2 disehargiiig intp the iargerend fhfifihppr;

also obliquely. with re to .isto- I so I a, film between such wall and the stream 1o? pipe, an airinjecting nozzle arranged centrally in the lower portion of the-lower pipe, and an annular fluid chamber arranged at the top of said lower pipe; and rovidedwith jet ports arran ed in e; circu ar series and presented in a to discharge tangentially to the circle thus described,' and also to discharge obliquely with r'espect'tothe axis of the pipes.

3. In an air lift pump, the'combination with the'discharge pipethereof, of en injector pipe entering said discharge 1pc in a transverse direction, and so bent tlat its end portion is, in the line of the axis of the irection dischargepine' whereby it forms an injector nozzle, said 1n ector pi having a flattened form in cross section rom its point of entrance to and including the bend in it, the longer dimension of such flattened form being parallel to the axis-of the discharge P P as my own, I have hereto aflixed myfisignn- ,ture in the presence of two witnesses.

e v t In testimony that I claim the foregoing 

